<?php

use App\Models\Ticket;
use App\Services\TicketAiSummaryService;
use App\Support\Settings;
use Illuminate\Support\Facades\Http;

function enableAiSummary(): void
{
    Settings::set('ai_enabled', '1');
    Settings::set('ai_base_url', 'https://ai.test');
    Settings::set('ai_model', 'llama-3.3-70b-versatile');
    Settings::set('ai_summary_enabled', '1');
}

function summaryTicket(array $overrides = []): Ticket
{
    return Ticket::query()->create(array_merge([
        'number' => (string) random_int(100000, 999999),
        'email' => 'client@example.com',
        'name' => 'Test Client',
        'subject' => 'Problem z drukarką',
        'body' => 'Drukarka nie działa od rana.',
        'status_key' => 'new',
        'priority_key' => 'medium',
        'custom_fields' => [],
    ], $overrides));
}

function fakeAiSummaryChat(string $content): void
{
    Http::fake(['ai.test/*' => Http::response(['choices' => [['message' => ['content' => $content]]]])]);
}

test('generates and stores a summary + suggested action for a fresh ticket', function () {
    enableAiSummary();
    fakeAiSummaryChat('{"summary": "Klient zgłasza awarię drukarki.", "suggested_action": "Poproś o model drukarki."}');

    $ticket = summaryTicket();

    $totals = app(TicketAiSummaryService::class)->run();

    expect($totals)->toBe(['scanned' => 1, 'updated' => 1, 'failed' => 0]);
    $ticket->refresh();
    expect($ticket->ai_summary)->toBe('Klient zgłasza awarię drukarki.');
    expect($ticket->ai_suggested_action)->toBe('Poproś o model drukarki.');
    expect($ticket->ai_summary_generated_at)->not->toBeNull();
});

test('a ticket with a newer message than its last summary is picked up again', function () {
    enableAiSummary();
    $ticket = summaryTicket();
    $ticket->messages()->create(['author_name' => 'Test Client', 'body' => 'Pierwsza wiadomość.']);
    $ticket->update(['ai_summary' => 'stare podsumowanie', 'ai_summary_generated_at' => now()->subDay()]);

    // A message created "now" postdates the day-old summary.
    $ticket->messages()->create(['author_name' => 'Operator', 'body' => 'Nowa odpowiedź operatora.']);

    fakeAiSummaryChat('{"summary": "Zaktualizowane podsumowanie.", "suggested_action": null}');

    $totals = app(TicketAiSummaryService::class)->run();

    expect($totals)->toBe(['scanned' => 1, 'updated' => 1, 'failed' => 0]);
    expect($ticket->refresh()->ai_summary)->toBe('Zaktualizowane podsumowanie.');
});

test('a ticket whose summary is already newer than its latest message is not reprocessed', function () {
    enableAiSummary();
    $ticket = summaryTicket();
    $ticket->messages()->create(['author_name' => 'Test Client', 'body' => 'Jedyna wiadomość.']);
    $ticket->update(['ai_summary' => 'aktualne podsumowanie', 'ai_summary_generated_at' => now()]);

    Http::fake();

    $totals = app(TicketAiSummaryService::class)->run();

    expect($totals)->toBe(['scanned' => 0, 'updated' => 0, 'failed' => 0]);
    Http::assertNothingSent();
});

test('an unrelated update() that only touches updated_at does not trigger re-summarization', function () {
    enableAiSummary();
    $ticket = summaryTicket();
    $ticket->messages()->create(['author_name' => 'Test Client', 'body' => 'Jedyna wiadomość.']);
    $ticket->update(['ai_summary' => 'aktualne podsumowanie', 'ai_summary_generated_at' => now()]);

    // Simulates e.g. a priority/status change touching tickets.updated_at
    // without any new ticket_messages row.
    $ticket->update(['priority_key' => 'high']);

    Http::fake();

    $totals = app(TicketAiSummaryService::class)->run();

    expect($totals)->toBe(['scanned' => 0, 'updated' => 0, 'failed' => 0]);
    Http::assertNothingSent();
});

test('a malformed AI response leaves the previous summary untouched and keeps the ticket stale', function () {
    enableAiSummary();
    $ticket = summaryTicket();
    $ticket->update(['ai_summary' => 'stare podsumowanie', 'ai_summary_generated_at' => null]);
    fakeAiSummaryChat('to nie jest JSON');

    $totals = app(TicketAiSummaryService::class)->run();

    expect($totals)->toBe(['scanned' => 1, 'updated' => 0, 'failed' => 1]);
    $ticket->refresh();
    expect($ticket->ai_summary)->toBe('stare podsumowanie');
    expect($ticket->ai_summary_generated_at)->toBeNull();
});

test('the transcript sent to the AI includes the ticket subject, its own body, and every message tagged by role', function () {
    enableAiSummary();
    $ticket = summaryTicket(['subject' => 'Problem z drukarką', 'body' => 'Drukarka nie działa od rana.']);
    $ticket->messages()->create(['author_name' => 'Test Client', 'body' => 'Dodatkowy szczegół.'])->attachAuthor(null, 'client');
    $ticket->messages()->create(['author_name' => 'Operator', 'body' => 'Sprawdzam sprawę.'])->attachAuthor(null, 'operator');

    fakeAiSummaryChat('{"summary": "ok", "suggested_action": null}');

    app(TicketAiSummaryService::class)->run();

    Http::assertSent(function ($request) {
        $userMessage = collect($request->data()['messages'])->firstWhere('role', 'user')['content'];

        return str_contains($userMessage, 'Temat: Problem z drukarką')
            && str_contains($userMessage, 'Treść:')
            && str_contains($userMessage, 'Drukarka nie działa od rana.')
            && str_contains($userMessage, '[klient] Test Client: Dodatkowy szczegół.')
            && str_contains($userMessage, '[operator] Operator: Sprawdzam sprawę.');
    });
});

test('generateFor() regenerates a single ticket immediately, ignoring the staleness check', function () {
    enableAiSummary();
    $ticket = summaryTicket();
    $ticket->update(['ai_summary' => 'aktualne podsumowanie', 'ai_summary_generated_at' => now()]);

    fakeAiSummaryChat('{"summary": "Świeże podsumowanie.", "suggested_action": null}');

    $result = app(TicketAiSummaryService::class)->generateFor($ticket);

    expect($result)->toBeTrue();
    expect($ticket->refresh()->ai_summary)->toBe('Świeże podsumowanie.');
});

test('generateFor() returns false without calling the AI when the integration is disabled', function () {
    Settings::set('ai_enabled', '0');
    $ticket = summaryTicket();

    Http::fake();

    expect(app(TicketAiSummaryService::class)->generateFor($ticket))->toBeFalse();
    Http::assertNothingSent();
});

test('ai_summary_enabled=0 makes no AI calls', function () {
    Settings::set('ai_enabled', '1');
    Settings::set('ai_base_url', 'https://ai.test');
    Settings::set('ai_model', 'llama-3.3-70b-versatile');
    Settings::set('ai_summary_enabled', '0');
    summaryTicket();

    Http::fake();

    $totals = app(TicketAiSummaryService::class)->run();

    expect($totals)->toBe(['scanned' => 0, 'updated' => 0, 'failed' => 0]);
    Http::assertNothingSent();
});